AU771489B2 - Fuel cell battery with a stack of planar cells - Google Patents

Fuel cell battery with a stack of planar cells Download PDF

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Publication number
AU771489B2
AU771489B2 AU48846/00A AU4884600A AU771489B2 AU 771489 B2 AU771489 B2 AU 771489B2 AU 48846/00 A AU48846/00 A AU 48846/00A AU 4884600 A AU4884600 A AU 4884600A AU 771489 B2 AU771489 B2 AU 771489B2
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Australia
Prior art keywords
fluid
fuel cell
cell battery
interconnectors
accordance
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AU48846/00A
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AU4884600A (en
Inventor
Emad Batawi
Bruno Doggwiler
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Hexis AG
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Hexis AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
    • H01M8/025—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form semicylindrical
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
    • H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
    • H01M8/0612—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants from carbon-containing material
    • H01M8/0625—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants from carbon-containing material in a modular combined reactor/fuel cell structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M2008/1293—Fuel cells with solid oxide electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0065—Solid electrolytes
    • H01M2300/0068—Solid electrolytes inorganic
    • H01M2300/0071—Oxides
    • H01M2300/0074—Ion conductive at high temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
    • H01M8/04074—Heat exchange unit structures specially adapted for fuel cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

The fuel cell battery has a stack (2) of planar cells (3,4) with alternating electrochemically active plates (3) and interconnectors (4) with intermediate straight or curved zones (20), interconnector profiling to divert two fluids (11, 12) separately through the cells, fluid inlets and outlets and a common outlet channel (5), whereby the second fluid is a heat carrier for reaction heat released during operation. The interconnectors are single-layered and their profiling is designed so that both fluids are guided always in contact with the electrochemically active plate. The direction of flow of the second fluid is reversed at one edge region (24). An Independent claim is also included for an application of a fuel cell battery, e.g. as a current supply component in a car.

Description

r/UUu I i z/9~ Regulation 3.2(2)
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT
S.
Application Number: Lodged: oooo Invention Title: FUEL CELL BATTERY WITH A STACK OF PLANAR CELLS The following statement is a full description of this invention, including the best method of performing it known to us FUEL CELL BATTERY WITH A STACK OF PLANAR CELLS The invention relates to a fuel cell battery comprising a stack of planar cells and to a use of the battery.
A centrally symmetric fuel cell battery is known from EP-A- 0 473 540 (=P.6380), the interconnectors of which are designed as special temperature equalization bodies. These equalization bodies are heat exchangers, by means of which reaction heat is transferred to supplied air before the latter is brought into contact with the PENs, the electrochemically active elements of the fuel cells (PEN: Positive electrode, solid Electrolyte, Negative electrode). This heat exchanger is a plate-like hollow body, in the inner space of which the heat transfer to the air takes place. The two outer side surfaces of the interconnector having profilings, by means of which on the one hand electrical contacts to the electrodes of the PENs are produced and which on the other hand leave gap-like electrode spaces free between the interconnectors and the electrodes for the •o00 reaction components (air, fuel, gas).
During the operation of the battery, temperature gradients arise in the PENs which are directed radially. These gradients are relatively small so that thermal stresses cause no damage, in particular tears, in the sensitive solid oo electrolytes of the PENs.
The interconnectors, which are designed as heat exchangers, are expensive; their share of the costs in manufacture of the fuel cell battery is considerable. A plurality of suggestions for the manufacture of interconnectors have already been made with the goal of reducing the costs. For example in EP- A- 0 936 688 (=P.6864) an interconnector designed as a heat exchanger is described, for the manufacture of which one or two sintered bodies are used, with the sintered bodies being pre-shaped, namely through pressing of a powder mixture into the shape of the finished part and subsequent sintering.
The object of the invention is to create a fuel cell batter, the manufacturing costs of which are further reduced.
In accordance with the present invention, there is provided a fuel cell battery, which contains a stack of planar cells, has the following features: a) Electrochemically active plates, the so-called PENs, and interconnectors are arranged in an alternating sequence.
N:\2\17466\au\00\20040120 Speci V1 .doc\\ b) The PENs and accordingly the interconnectors have in each case a first edge and second edge, between which a straight or curved zone with a largely constant width extends.
c) This zone is subdividable into sectors through which the two edges are connected.
d) The interconnectors having profilings by means of which two fluids can be separately conducted through the cells.
e) In each sector there are provided entry points for the first fluid at the first edge, entry points for the second fluid at the second edge as well as outlet 10 points for both fluids.
e ee *e e N:\2\17466\au\00\20040120 Speci Vl.doc\\ -3f) The outlet points open into a common passage.
g) The second fluid is provided as a heat carrier medium for reaction heat which is liberated at the PEN during an operation.
h) In accordance with the invention the interconnectors are single layered and their profiling is in each case executed in such a manner that both fluids are always conducted in contact with the PEN.
i) A turning region is provided at the first edge by means of which a reversal of the flow direction of the second fluid results.
k) Furthermore, the dimensioning of the cells is executed in such a manner that harmful thermal stresses in the PEN are not exceeded during the operation.
The invention is based on a recognition relating to the following considerations. As model calculations have shown, the results of which are illustrated in the named EP-A- 0 473 540, the reaction heat which is liberated at the PENs is transferred to the interconnectors mainly through thermal radiation. The heat transport as a result of a heat conduction through the air filled electrode space is practically negligible. The wall of the interconnector has at each point a temperature which differs by only a few degrees Kelvin from the temperature at the corresponding point of the PEN. This wall temperature thus does not depend significantly on the temperature of the air to be heated up in the hollow space. The reason for this is a relatively low heat flow between the wall and the air.
The fact that such conditions are present in the heat transport in the interconnectors is not obvious as a result of the disclosed results of the -4model calculation. If one however becomes conscious of these conditions, then one can pose the question whether an interconnector which is designed as a hollow body is actually necessary in order to conduct off the reaction heat in the manner which is described in EP-A- O 473 540. The answer, that it is possible in a different manner, is given by the solution in accordance with the invention. The air (the second fluid) can already be brought into contact with the PEN at the entry point so that it is possible to design the interconnector in a single layer thus more economically and not as a double layered hollow body (two walls, one hollow space). The air to be heated admittedly causes additional temperature gradients in the PEN. Such gradients, which are directed tangentially (azimuthally), have an order of magnitude similar to that of the radial temperature gradients which result in the operation of known cells. Thus it can be expected that the thermal stresses do not take on substantially greater values in the use of the single layer interconnectors. Measures can also be provided as a result of which the additional components of the temperature gradients can be kept relatively low.
The named prior art relates to centrally symmetrical fuel cell batteries.
The solution in accordance with the invention can however also be applied to batteries with for example rectangular cells in which the fuel gas (first fluid) is fed in at the one side and the air (second fluid) at the opposite side. In addition it is the case that the first fluid can be any desired gas composition with combustible components and the second fluid is a gas containing oxygen, under the assumption that exothermic reactions which supply electrical current can be carried out at the PEN with these gases.
The interconnectors of the fuel cell battery in accordance with the invention yield further advantages thanks to their being single layered: a) the masse of the battery is smaller than that of the known batteries; b) the constructional size is also reduced. Therefore the battery in accordance with the invention, can also be easily used for a mobile application, for example as current supplying components in an automobile or-for an emergency power aggregate which is to be rapidly transportable to a potential site of use.
The dependent claims 2 to 9 relate to advantageous embodiments of the invention. The subject of claim 10 is a use in mobile applications.
S7 In the following the invention will be explained with reference to the drawings. Shown are: Fig. 1 a schematic illustration of the fuel cell battery in accordance with the invention, Fig. 2 a cross-section through a cell and a second, adjacent
PEN,
S.
Fig. 3 a plan view of a zone of a usual basic form of the fuel cell battery, Fig. 4 an interconnector with a profiling seen from the air side, Fig. 5 the reverse side of the interconnector of Fig. 4, -6- Fig. 6 a cross-section through a part of a cell stack, Fig. 7 a variant of the interconnector of Fig. 4 and Fig. 8 a cross-section through a further interconnector.
A fuel cell battery 1, such as is schematically illustrated in Fig. 1, comprises a stack 2 of planar cells which each consist of a PEN 3 and an interconnector 4 (illustrated as a plan view). The PENs 3 and interconnectors 4 are arranged in an alternating sequence. The PENs 3 and, accordingly, the interconnectors 4 have in each case a first edge 21 and a second edge 22. Between the edges 21 and 22 there extends a zone 20 which is straight in the present illustration, but which can also be curved however. The zone 20 has a largely constant width. It can be subdivided into sectors 23 with side lines 23a and 23b which connect the two edges 21 and 22. The interconnectors 4 have profilings (cf. Fig.
by means of which two fluids 11 and 12 can be conducted separately through the cells. In each sector there are provided entry points 211 for the first fluid 11 at the first edge, entry points 212 for the second fluid 12 at the second edge as well as outlet points 213 for both fluids. The outlet points 213 open into a common passage 5 which extends along the stack 2 and which is advantageously used as an afterburner chamber, namely for the combustion of the components which are still present in the first fluid 11 and are still capable of reacting. The second fluid 12 is provided as a heat carrier medium for the reaction heat which is liberated on the PENs 3.
-7- In accordance with the invention the interconnectors 4 are single layered. Their profiling is in each case executed in such a manner that both fluids 11 and 12 respectively are always conducted in contact with the PEN 3. At the first edge 211 a turning region 24 is provided, by means of which a reversal of the flow direction of the second fluid 12 results. The battery 1 is dimensioned in such a manner that harmful thermal stresses are not exceeded in the PEN 3 during operation. The dimensioning relates to the thickness of the interconnector 4, its profiling and its width width of the zone 30). The air factor the factor which specifies the stoichiometric air excess) also plays a role in the dimensioning and likewise the amount of heat which is given off to -""the surroundings by the stack 2 as radiation 6.
The surrounding comprises a sleeve 10 at the or around the cell stack 2 which is permeably structured so that radiative heat 6 can be taken up by the second fluid 12 during inflow to the cell stack 2. A large portion of the heat at least about one third which arises in the PEN reactions is advantageously carried off out of the cell stack 2 through radiation 6. Thus the second fluid 12 can enter relatively hot into the cell stack 2 so that the additional thermal stresses which are caused in the PEN 3 through direct contact with the fluid 12 are relatively small.
It is also advantageous if a reformer is arranged on the side of the first edge 21 in which a fuel is converted by means of endothermic reactions into a form which is suitable for the PEN reactions. The radiation 6 can thus be used as a heat source for the endothermic reactions.
The single layered interconnectors 4 are advantageously pre-shaped -8sintered parts; or they are manufactured of such. Since the material to be used for the manufacture contains chromium, the sintered parts must also be provided with suitable protective layers.
The interconnector 4 which is shown in Fig. 2 has profilings which form relief structures on a partition wall 40. These profilings comprise knoblike elevations 41 and comb-like elevations 42. On the one hand the elevations 41 and 42 produce electrical contacts to the PENs 3. On the other hand the comb-like elevations 42 serve to conduct the fluids 11 and 12, in particular at the side of the second fluid 12, which is directed as flow 12a from the edge 22 see Fig. 1 to the turning region 24 (arrow 12") and is directed in reverse as flow 12b.
The fuel cell battery 1 is advantageously designed to be centrally symmetrical. In Fig. 3 a corresponding section of the zone 20 with a sector 23 is illustrated. The edge 21 lies on the surface of a central passage in this geometry, via which the first fluid 11 can be fed into the cell stack 2. An elongate, cylindrical reformer is advantageously arranged in this passage.
Fig. 4 shows an interconnector 4 with a profiling seen from the air side.
The flow of the air, i.e. of the second fluid 12, is indicated by arrows.
Comb-like elevations 42 have a spiral shape. (A sector 23 in accordance with Fig. 1 or 4 not drawn in has a corresponding spiral shape. Six sectors are present.) The second fluid 12 (arrow 12' is conducted from the entry point 212 through a passage 43 which is formed by the comblike elevations 42 to the turning region 24 (arrow 12a). There the flow direction of the second fluid 12 is reversed (arrow 12") so that the fluid -9- 12 flows back to the edge 22 in the opposite direction (arrow 12b). In the regions between the passages 43, in which the fluid 12 flows back, the profiling consists of knob-like elevations 42, which is partly schematically illustrated as a field with crosses 41'. At the outlet point 213 the fluid 12 enters into the passage-like afterburner chamber The passages 43 can also be rectilinear instead of spiral-shaped and indeed directed radially to the center of the interconnector 4. Instead of six sectors 23 the profiling of the interconnector 4 can also have fewer or more sectors 23, advantageously a number between four and ten.
Fig. 5 shows the reverse side of the single layered interconnector 4 of *:so 0*o6 Fig. 4. On this side the first fluid 11 is conducted from a central •passage (within the edge 211) between knob-like elevations 41' and by means of comb-like elevations 42 to the outlet points 213 at the outer edge 212.
Fig. 6 shows a cross-section through the interconnector 4 of Figs. 4 and' 5 along the line VI VI in Fig. 4. The heat transport in the cell 3, 4 is indicated by arrows which lie in the plane of the diagram. The crosssection of the passage 43 has a depth in the direction perpendicular to the PEN 3 which is greater in comparison with the corresponding depths of the remaining profiling. Thanks to the relatively large passage cross-section a flow of the fluid 12 (arrow 12a) develops which has a minimum heat extraction from an overflowed region 343 of the PEN 4 as a result. Practically no current generating reactions take place in the middle of this region 343. Heat is supplied from the interconnector 4 to the region 343 via the comb-like elevation 42 on the side of the fluid 11.
The air side of the interconnector 4 can be designed in such a manner that see Fig. 6 the second fluid 12 (arrows 12', 12a) is already conducted through a profiling with knob-like elevations 41' when being fed in. Current generating reactions likewise take place in this infeed region.
In a further exemplary embodiment with an interconnector 4 in accordance with Fig. 8 there is a combination of features for the infeed passage 43 which are given from the two embodiments in accordance with Figs. 6 and 7. Thanks to knob-like elevations 41 in the passage 43 the current supplying PEN reactions take place there as well although to a somewhat reduced extent.
"Comprises/comprising" when used in this specification is taken to specify the presence of stated features integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

Claims (9)

1. Fuel cell battery including a stack of planar cells with a) electrochemically active plates so called PENs and interconnectors being arranged in an alternating sequence, b) the PENs and accordingly the interconnectors having in each case a first edge and a second edge, between which a straight or curved zone with a largely constant width extends, c) this zone being subdividable into sectors through which the two edges are connected, d) the interconnectors having profilings by means of which two fluids can be separately conducted through the cells, e) in each sector there being provided entry points for the first fluid at the first edge, entry points for the second fluid at the second edge as well as outlet points for both fluids, f) the outlet points opening into common passage for the entire cell stack and g) the second fluid being provided as a heat carrier medium for .c S" reaction heat which is liberated at the PEN during an operation, characterized in that the interconnectors are single layered and their profiling is in each case executed in such a manner that both fluids are always conducted in contact with the PEN; in that a turning region is provided at the first edge by means of which a reversal of the flow direction of the second fluid results; and in that the dimensioning of the cells is executed in such a manner that harmful thermal stresses in the PEN are not exceeded during the operation.
2. Fuel cell battery in accordance with claim 1, characterized in that the individual interconnectors are pre-shaped sintered parts or are manufactured of such.
3. Fuel cell battery in accordance with claim 1 or claim 2, characterized in that the profilings of the interconnectors have knob-like elevations which produce electrical contacts to the PENs. N:\2\17466\au\00\20040120 Speci Vl.doc\\
4. Fuel cell battery in accordance with any one of the claims 1 to 3, characterized in that the profiling of the interconnectors for conducting fluids have comb-like elevations, in particular on the side of the second fluid; and in that these elevations produce electrical contacts to the PENs.
Fuel cell battery in accordance with claim 4, characterized in that at least a portion of the comb-like elevations have a spiral shape or are directed in a straight line as well as radially.
6. Fuel cell battery in accordance with any one of the claims 1 to characterized in that in each sector a passage which leads to the turning region is provided for the second fluid, the cross-section of which has a depth in the 9 direction perpendicular to the PEN which is greater in comparison to the corresponding depths of the remaining profiling.
7. Fuel cell battery in accordance with any one of the claims 1 to 6, characterized in that the cells are dimensioned in such a manner that during the operation of the battery at least one third of the waste heat which arises in the i PEN reactions is led off out of the cell stack through radiation.
8. Fuel cell battery in accordance with any one of the claims 1 to 7, characterized in that the cells are designed to be at least approximately centrally symmetrical, the first fluid can be fed in via a central passage which extends in the axial direction, preferably that a reformer for the processing of the first fluid is arranged in this passage, the common passage is provided as an afterburner chamber at the outlet points and a sleeve around the cell stack is permeably structured so that radiated off reaction heat can be taken up by the second fluid during inflow to the cells.
9. Fuel cell battery in accordance with claim 8, characterized in that the sectors are of equal size and their number lies between four and ten. N:\2\1 7466\au\00\20040120 Speci V 1.doc\\ 13 Use of a fuel cell battery in accordance with any one of the claims 1 to 9 for a mobile application, for example as current supplying components in an automobile or in an emergency power aggregate. DATED this 20th day of January 2004 SULZER HEXIS AG WATERMARK PATENT TRADE MARK ATTORNEYS 290 BURWOOD ROAD HAWTHORN VICTORIA 3122 AUSTRALIA P17466AU00 N:\2\17466\au\00\20040120 Speci Vl.doc\\
AU48846/00A 1999-07-28 2000-07-26 Fuel cell battery with a stack of planar cells Ceased AU771489B2 (en)

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Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6569554B1 (en) * 1999-07-28 2003-05-27 Sulzer Hexis Ag Fuel cell battery with a stack of planar cells
EP1264360B1 (en) * 2001-02-12 2006-06-07 The Morgan Crucible Company Plc Flow field plate geometries
WO2002075833A2 (en) * 2001-03-17 2002-09-26 Bayerische Motoren Werke Aktiengesellschaft Fuel cell with integrated heat exchanger
US6773845B2 (en) 2001-06-27 2004-08-10 Delphi Technologies, Inc. Fluid distribution surface for solid oxide fuel cells
WO2003009411A1 (en) * 2001-07-18 2003-01-30 Kabushiki Kaisha Toshiba Solid-state polymer type fuel cell stack
US6780536B2 (en) 2001-09-17 2004-08-24 3M Innovative Properties Company Flow field
GB2387476B (en) * 2002-06-24 2004-03-17 Morgan Crucible Co Flow field plate geometries
JP4324348B2 (en) * 2002-06-28 2009-09-02 本田技研工業株式会社 Fuel cell
JP4324347B2 (en) * 2002-06-28 2009-09-02 本田技研工業株式会社 Fuel cell
JP2004146345A (en) * 2002-08-28 2004-05-20 Honda Motor Co Ltd Fuel cell
JP4324409B2 (en) * 2002-08-28 2009-09-02 本田技研工業株式会社 Fuel cell
GB2413001A (en) * 2004-04-02 2005-10-12 Morgan Crucible Co Flow field plate geometries
WO2004114446A1 (en) * 2003-06-18 2004-12-29 The Morgan Crucible Company Plc Flow field plate geometries
JP4617711B2 (en) 2004-04-30 2011-01-26 日産自動車株式会社 Fuel cell
JP4598514B2 (en) * 2004-12-28 2010-12-15 本田技研工業株式会社 Fuel cell and fuel cell stack
EP1724864A1 (en) * 2005-05-18 2006-11-22 Sulzer Hexis AG Interconnector for flat high temperature fuel cell
JP4611196B2 (en) * 2005-12-28 2011-01-12 本田技研工業株式会社 Fuel cell and fuel cell stack
JP4611194B2 (en) 2005-12-28 2011-01-12 本田技研工業株式会社 Fuel cell and fuel cell stack
US8158294B2 (en) * 2006-01-13 2012-04-17 Panasonic Corporation Fuel cell system and method of operating fuel cell system
CN101479876B (en) * 2006-04-11 2013-01-02 myFC股份公司 Improved electrochemical device
EP1990856B1 (en) 2007-05-09 2013-01-23 Hexis AG Method for creating contacts between electrochemically active discs and interconnectors in high-temperature fuel cells
DE102009037148B4 (en) * 2009-08-06 2014-02-20 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Solid oxide fuel cell system
EP3376575B1 (en) 2017-03-16 2020-04-29 Hexis AG Method for producing a metallic interconnector for a fuel cell stack, and metallic interconnector made using the method
KR102027764B1 (en) 2018-03-30 2019-10-04 한국과학기술연구원 A separator for a fuel cell and a fuel cell stack comprising the same
CN114361502B (en) * 2022-01-06 2023-10-10 江苏大学 She Maiyan-based bionic proton exchange membrane fuel cell

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59108285D1 (en) 1990-08-27 1996-11-21 Sulzer Innotec Ag Heat balance in solid electrolyte fuel cells
US5186806A (en) * 1990-12-31 1993-02-16 California Institute Of Technology Ceramic distribution members for solid state electrolyte cells and method of producing
US5230966A (en) * 1991-09-26 1993-07-27 Ballard Power Systems Inc. Coolant flow field plate for electrochemical fuel cells
DE59409325D1 (en) 1994-11-23 2000-06-08 Sulzer Hexis Ag Winterthur High-temperature fuel cell with chromium-containing connecting elements between electrochemically active plates
EP0749171B1 (en) 1995-06-13 1999-04-21 Sulzer Hexis AG High-temperature fuel cell
US6344290B1 (en) * 1997-02-11 2002-02-05 Fucellco, Incorporated Fuel cell stack with solid electrolytes and their arrangement
US5981098A (en) * 1997-08-28 1999-11-09 Plug Power, L.L.C. Fluid flow plate for decreased density of fuel cell assembly
US5945232A (en) * 1998-04-03 1999-08-31 Plug Power, L.L.C. PEM-type fuel cell assembly having multiple parallel fuel cell sub-stacks employing shared fluid plate assemblies and shared membrane electrode assemblies
US6015633A (en) * 1998-10-07 2000-01-18 Plug Power, L.L.C. Fluid flow plate for water management, method for fabricating same, and fuel cell employing same
US6432567B1 (en) * 1999-03-17 2002-08-13 Sulzer Hexis Ag Fuel cell battery with afterburning at the periphery of a cell stack
US6569554B1 (en) * 1999-07-28 2003-05-27 Sulzer Hexis Ag Fuel cell battery with a stack of planar cells

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